CN115257412A - Hybrid power system control method and system - Google Patents

Hybrid power system control method and system Download PDF

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Publication number
CN115257412A
CN115257412A CN202210772010.1A CN202210772010A CN115257412A CN 115257412 A CN115257412 A CN 115257412A CN 202210772010 A CN202210772010 A CN 202210772010A CN 115257412 A CN115257412 A CN 115257412A
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China
Prior art keywords
control unit
power
battery
state
charge
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CN202210772010.1A
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Chinese (zh)
Inventor
尹建坤
马艳红
宋浩源
郭丁伊
刘加明
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FAW Group Corp
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FAW Group Corp
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Priority to CN202210772010.1A priority Critical patent/CN115257412A/en
Publication of CN115257412A publication Critical patent/CN115257412A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a control method and a control system of a hybrid power system. The control method comprises the following steps: under a running preparation completion mode, a whole vehicle control unit determines a power demand, if the power demand exceeds the power capacity of a power battery, a fuel battery is started, and if the power demand does not exceed the power capacity of the power battery, the whole vehicle control unit works in an electric-only mode; in the parking charging mode, the solar battery wakes up the whole vehicle control unit when being used, the whole vehicle control unit sends available charging information to the terminal, and when the charging condition is met, the whole vehicle control unit controls the relay to be electrified and controls the solar battery to charge the power battery. According to the embodiment of the invention, the solar battery and the fuel battery work cooperatively to provide power for the vehicle, and when the vehicle is in a parking charging state, the solar battery control unit controls the solar battery to charge the power battery according to the power of the solar battery and the charge state of the power battery, so that the full utilization of the electric energy of the solar battery and the battery is realized, and the power supply efficiency is improved.

Description

Hybrid power system control method and system
Technical Field
The invention relates to the technical field of automobiles, in particular to a control method and a control system of a hybrid power system.
Background
With the popularization of solar panels in vehicles and the improvement of energy efficiency levels of the solar panels, the solar panels are beginning to be used for providing power for the vehicles, and the mileage of the energy converted by the solar panels for the whole vehicles is increasing.
In the existing technical scheme, solar energy is generally applied to low-voltage accessories and is mainly connected with a power battery in parallel to provide power for a whole vehicle, for example, solar power is stored in a storage battery of the vehicle to supply power for the vehicle, the solar energy is output to an electric appliance through the battery, efficiency loss exists, and solar energy resources cannot be fully utilized.
Disclosure of Invention
The invention provides a hybrid power system control method and system, and aims to solve the problems that solar energy resources cannot be fully utilized and power supply efficiency is low.
In order to realize the technical problem, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a hybrid system control method, including:
the system comprises a vehicle control unit, a fuel cell, a power cell, a relay, a solar cell control unit and a gateway; the power battery is connected with the first end of the relay, and the fuel battery is connected with the second end of the relay; the second end of the relay is connected with a driving motor;
the control method comprises the following steps:
in a running preparation completion mode, the finished automobile control unit determines a power demand according to a driving operation, requests to start the fuel cell when the power demand exceeds the power capacity of the power cell, and works in an electric-only mode if the power demand does not exceed the power capacity of the power cell;
if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery;
under the parking charge mode, awaken up when solar cell control unit detects that solar cell can use whole car control unit, whole car control unit sends the available information that charges to the terminal, if receive the charge request that the terminal sent, when satisfying the charging condition, whole car control unit control the relay is gone up the electricity, passes through simultaneously solar cell control unit control solar cell charges for power battery.
Optionally, the vehicle control unit determines a power demand according to a driving operation, and requests to start the fuel cell when the power demand exceeds the power capability of the power cell, including:
when the state of charge of the power battery is smaller than a second preset value, controlling the start of the fuel battery;
the charging condition comprises that the state of charge of the power battery is smaller than a third preset value; wherein the third preset value is greater than the second preset value.
Optionally, the method further comprises: when the state of charge of the power battery is greater than or equal to the third preset value, the finished automobile control unit controls the fuel battery to stop;
and when the state of charge of the power battery is greater than the first preset value, the solar battery control unit controls the solar battery to stop working.
Optionally, the necessary conditions for entering the parking charging mode include: no person is on the vehicle, the vehicle is in a locked state, and the vehicle network is in a sleep mode.
Optionally, the charging conditions include at least one of: the high-voltage power-on forbidding fault is not generated, the cabin cover is in a closed state, the vehicle door is in a closed state, the low-voltage power supply state is in an off state, and the charge state of the power battery is smaller than the first preset value.
Optionally, the fuel cell comprises a fuel cell stack, a first DC/DC and a fuel cell control unit; the second end of the relay is connected with a second DC/DC;
the whole car the control unit control the relay is gone up the electricity, passes through simultaneously solar cell the control unit control solar cell charges for power battery, includes:
the whole vehicle control unit controls the relay to be electrified and controls the fuel cell control unit to enable the first DC/DC;
when the relay feedback relay is closed, the first DC/DC is in a working state, the second DC/DC is in a working state, the whole vehicle control unit sends a working request to the solar battery control unit, and when the feedback working state of the solar battery control unit is received as the working state, the vehicle control unit enters a parking charging mode.
Optionally, if at least one of the following conditions is met in the starting charging process or the parking charging process, the parking charging and discharging process is performed, and meanwhile, the entire vehicle control unit reports the charging stop to the terminal:
a fault high-voltage power-off request, an engine room cover is opened, a vehicle door is opened, and a low-voltage power supply state is not in a closed state; the first DC/DC feedback working state is a non-working state, the second DC/DC feedback working state is a non-working state, and the working state of the solar cell control unit is a non-working state for more than preset time;
and the state of charge of the power battery is greater than the first preset value.
Optionally, the parking charging lower current range includes:
the whole vehicle control unit sends a work stopping request to the solar cell control unit, stops the first DC/DC enabling, stops the second DC/DC enabling, controls the relay to be powered off, and enables the vehicle network to enter a sleep state.
In a second aspect, the present invention provides a hybrid system comprising:
the system comprises a vehicle control unit, a fuel cell, a power cell, a relay, a solar cell control unit and a gateway; the power battery is connected with the first end of the relay, and the fuel battery is connected with the second end of the relay; the second end of the relay is connected with a driving motor; the solar battery control unit and the whole vehicle control unit are in communication connection with the gateway;
in a running preparation completion mode, the vehicle control unit is used for determining a power demand according to a driving operation, requesting to start the fuel cell when the power demand exceeds the power capacity of the power cell, and working in an electric-only mode if the power demand does not exceed the power capacity of the power cell;
the whole vehicle control unit is used for sending a request to the solar cell control unit when the state of charge of the power battery is smaller than a first preset value and the reported state of the solar cell control unit is available so as to control the solar cell to output electric energy to the driving motor or charge the power battery;
in a parking charging mode, the solar cell control unit is used for awakening the whole vehicle control unit when detecting that the solar cell can be used, the whole vehicle control unit sends available charging information to the terminal, and if a charging request sent by the terminal is received; when the charging condition is met, the whole vehicle control unit is used for controlling the relay to be electrified, and meanwhile, the solar battery is controlled by the solar battery control unit to charge the power battery.
Optionally, the fuel cell comprises a fuel cell stack, a first DC/DC and a fuel cell control unit; a first terminal of the first DC/DC is connected to the solar cell and the fuel cell stack; a second end of the first DC/DC is connected with a second end of the relay;
and the fuel cell control unit is in communication connection with the whole vehicle control unit.
Optionally, the fuel cell comprises a fuel cell stack, a first DC/DC and a fuel cell control unit; a first terminal of the first DC/DC is connected to the fuel cell stack; a second end of the first DC/DC is connected with a second end of the relay; the solar battery is connected with the first end of the relay;
and the fuel cell control unit is in communication connection with the whole vehicle control unit.
According to the technical scheme of the embodiment of the invention, the solar battery and the fuel battery work cooperatively to provide power for the vehicle, if the power requirement of the vehicle exceeds the power capability of the power battery, the fuel battery is started to supply power for the vehicle together with the solar battery and the power battery, and if the power requirement of the vehicle does not exceed the power capability of the power battery, the vehicle works in a pure electric mode, namely the vehicle is supplied with power only through the solar battery and the power battery; and when the vehicle is in a parking charging state, the solar cell control unit can control the solar cell to charge the power cell according to the power of the solar cell and the charge state of the power cell, so that the solar energy and the electric energy of the cell are fully utilized, and the power supply efficiency is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a hybrid powertrain control method provided by an embodiment of the present invention;
FIG. 2 is a flow chart of another hybrid powertrain control method provided by an embodiment of the present invention;
FIG. 3 is a flow chart of yet another hybrid powertrain control method provided by an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for controlling a hybrid powertrain according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for controlling a hybrid powertrain according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a method for controlling a hybrid powertrain according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a hybrid power system according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another hybrid powertrain system provided in accordance with an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another hybrid power system according to an embodiment of the present invention.
In the figure:
the system comprises a whole vehicle control unit 1, a fuel cell 2, a fuel cell stack 21, a first DC/DC22, a fuel cell control unit 23, a power battery 3, a relay 4, a solar cell 5, a solar cell control unit 6, a gateway 7, a driving motor 8, a second DC/DC9, a terminal 10 and a vehicle-mounted remote communication terminal 11.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Embodiments of the present invention provide a control method for a hybrid system, which may be applied to an automobile or the like equipped with a solar cell and a fuel cell. The method is performed by a hybrid powertrain system comprising: the system comprises a vehicle control unit 1, a fuel cell 2, a power battery 3, a relay 4, a solar cell 5, a solar cell control unit 6 and a gateway 7; the power battery 3 is connected with a first end of the relay 4, and the fuel battery 2 is connected with a second end of the relay 4; the second end of the relay 4 is connected with a driving motor 8.
Fig. 1 is a flowchart of a control method of a hybrid system according to an embodiment of the present invention, and referring to fig. 1, the control method includes:
s101, in a running preparation completion mode, a finished automobile control unit determines a power demand according to driving operation, when the power demand exceeds the power capacity of a power battery, the fuel battery is requested to be started, and if the power demand does not exceed the power capacity of the power battery, the finished automobile control unit works in an electric-only mode.
Specifically, the running preparation completion mode refers to a state in which the vehicle can run after high-voltage power-on operation is performed by one-key starting or key door. The driving operation may include vehicle speed and accelerator pedal opening, etc., and the torque demand is confirmed by looking up a table and then converted into a power demand according to the rotational speed of the driving motor. When the power demand exceeds the power capacity of the power battery, the fuel battery is requested to be started, the vehicle is powered by the power battery, the solar battery and the fuel battery together, and if the power demand does not exceed the power capacity of the power battery, the vehicle is operated in a pure electric mode, and the vehicle is powered by the power battery and the solar battery together or only by the power battery.
And S102, if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
Specifically, the state of charge may also be called a remaining capacity, which represents a ratio of a dischargeable capacity remaining in the battery to a capacity of a fully charged state thereof, for example, when the state of charge is 0%, it means that the battery is fully discharged, and when the state of charge is 100%, it means that the battery is fully charged. The first preset value may be an upper charging limit of the power battery, for example, the state of charge is 95%, 98%, etc., and if the state of charge is equal to 100%, overcharge may be easily caused, which may cause damage to the battery, such as deformation and shortened service life. The state reported by the solar cell control unit is available, and the voltage of the solar cell can reach a voltage value capable of being output externally. When the state of charge of the power battery is smaller than the upper charging limit of the power battery and the voltage of the solar battery reaches a voltage value capable of being output externally, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
S103, in the parking charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit wakes up the whole vehicle control unit, the whole vehicle control unit sends available charging information to the terminal, if a charging request sent by the terminal is received, the whole vehicle control unit controls the relay to be electrified when the charging condition is met, and meanwhile, the solar battery is controlled to charge the power battery through the solar battery control unit.
Specifically, the necessary conditions for entering the parking charge mode include: no person is on the vehicle, the vehicle is in a locked state, and the vehicle network is in a sleep mode. The charging conditions include at least one of: the method comprises the following steps that no high-voltage electrifying forbidding fault exists, an engine room cover is in a closed state, a vehicle door is in a closed state, a low-voltage power supply state is in an off state, and the charge state of a power battery is smaller than a first preset value. Wherein the engine cover is the engine cover. Inhibiting a high voltage power-on fault includes, but is not limited to: the deviation of the state of charge of the single batteries of the power battery is too high, namely, the deviation of the state of charge among a plurality of single batteries in the battery system is too large, and a relay is opened, a spring fails to be jointed or cannot be separated after the spring is jointed. The low-voltage power state may include that the vehicle is in a parking state, for example, when the vehicle is in an OFF gear, that is, the vehicle power is not powered, and the vehicle network is also in a sleep state. In the parking charging mode, when the solar battery control unit detects that the voltage of the solar battery has the capacity of being output externally, the whole vehicle control unit wakes up the whole vehicle control unit, the whole vehicle control unit sends available charging information to the terminal, if a charging request sent by the terminal is received, the whole vehicle control unit controls the relay to be powered on when the charging condition is met, and meanwhile, the solar battery is controlled by the solar battery control unit to charge the power battery. The terminal can be cell-phone APP, and whole car the control unit can send the information to cell-phone APP through on-vehicle remote communication terminal.
According to the technical scheme of the embodiment of the invention, the solar battery and the fuel battery work cooperatively to provide power for the vehicle, if the power requirement of the vehicle exceeds the power capability of the power battery, the fuel battery is started to supply power for the vehicle together with the solar battery and the power battery, and if the power requirement of the vehicle does not exceed the power capability of the power battery, the vehicle works in a pure electric mode, namely the vehicle is supplied with power only through the solar battery and the power battery; and when the vehicle is in a parking charging state, the solar cell control unit can control the solar cell to charge the power battery according to the power of the solar cell and the charge state of the power battery, so that the solar energy and the battery electric energy are fully utilized, and the power supply efficiency is improved.
Alternatively, fig. 2 is a flowchart of another hybrid system control method according to an embodiment of the present invention. Referring to fig. 2, the hybrid system control method provided by the present embodiment includes:
s201, in a running preparation completion mode, if the state of charge of the power battery is smaller than a first preset value and the state reported by the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
And S202, when the state of charge of the power battery is smaller than a second preset value, controlling the start of the fuel battery.
Specifically, the second preset value may be a threshold value of the state of charge of the power cell that enables the fuel cell to be started. And when the state of charge of the power battery is smaller than a second preset value, the whole vehicle control unit controls the start of the fuel battery.
S203, when the charging condition comprises that the state of charge of the power battery is smaller than a third preset value; wherein the third preset value is greater than the second preset value.
Specifically, the third preset value may be a threshold value of the state of charge of the power cell that is capable of shutting down the fuel cell. And when the state of charge of the power battery is smaller than a third preset value, the whole vehicle control unit controls the fuel battery to continuously charge the power battery.
S204, in the parking charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit wakes up the whole vehicle control unit, the whole vehicle control unit sends available charging information to the terminal, if a charging request sent by the terminal is received, the whole vehicle control unit controls the relay to be electrified when the charging condition is met, and meanwhile, the solar battery is controlled to charge the power battery through the solar battery control unit.
Alternatively, fig. 3 is a flowchart of a control method of another hybrid system according to an embodiment of the present invention. Referring to fig. 3, the hybrid system control method provided by the present embodiment includes:
s301, in a running preparation completion mode, if the state of charge of the power battery is smaller than a first preset value and the state reported by the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
And S302, when the state of charge of the power battery is smaller than a second preset value, controlling the fuel to start.
S303, when the charging condition includes that the state of charge of the power battery is smaller than a third preset value; and the third preset value is larger than the second preset value.
And S304, when the state of charge of the power battery is greater than or equal to a third preset value, the finished automobile control unit controls the fuel battery to stop.
Specifically, when the state of charge of the power battery is greater than or equal to a third preset value, that is, the state of charge of the power battery is greater than or equal to a threshold value of the state of charge of the power battery for stopping the fuel battery, the vehicle control unit controls the fuel battery to stop, and stops charging the power battery.
S305, when the state of charge of the power battery is larger than a first preset value, the solar battery control unit controls the solar battery to stop working.
Specifically, when the state of charge of the power battery is greater than a first preset value, that is, the state of charge of the power battery is greater than the upper charging limit, the solar battery control unit controls the solar battery to stop charging the power battery or output electric energy to the driving motor.
S306, in the parking charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit wakes up the whole vehicle control unit, the whole vehicle control unit sends available charging information to the terminal, if a charging request sent by the terminal is received, the whole vehicle control unit controls the relay to be electrified when the charging condition is met, and meanwhile, the solar battery is controlled to charge the power battery through the solar battery control unit.
Alternatively, fig. 4 is a flowchart of a control method of another hybrid system according to an embodiment of the present invention. Referring to fig. 4, the control method of the hybrid system according to the embodiment includes:
s401, in a running preparation completion mode, if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
And S402, controlling the start of the fuel cell when the state of charge of the power cell is smaller than a second preset value.
Specifically, the fuel cell includes a fuel cell stack, a first DC/DC, and a fuel cell control unit. The fuel cell stack is used for generating electricity to charge the power battery, the first DC/DC can be a boosting DC/DC and used for controlling the solar battery and/or the fuel battery to deliver energy to the power battery, and the fuel battery control unit is used for controlling the working state of the fuel cell stack and the first DC/DC.
S403, when the charging condition comprises that the state of charge of the power battery is smaller than a third preset value; and the third preset value is larger than the second preset value.
S404, in the parking charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit is awakened, and the whole vehicle control unit sends available charging information to the terminal.
S405, if a charging request sent by the terminal is received, when a charging condition is met, the whole vehicle control unit controls a relay to be electrified and controls a fuel cell control unit to enable the first DC/DC.
Specifically, the second end of the relay is connected with a second DC/DC, and the second DC/DC can be a low-voltage power supply DC/DC and is used for converting part of energy in the power battery to supply power for the storage battery, so that the serious power shortage of the storage battery is avoided. When being in the parking charge mode, a lot of devices still are in operating condition and charge for power battery, can consume the electric quantity in the battery at this moment and maintain device work, cause battery electric quantity insufficient loss easily, and the battery insufficient voltage can lead to the vehicle can't launch, consequently need charge for the battery through second DC/DC during the parking charge mode. If a charging request sent by the terminal is received, the whole vehicle control unit controls the relay to be powered on in a combined manner when the charging condition is met, and meanwhile, the whole vehicle control unit controls the fuel cell control unit to enable the first DC/DC to charge the power battery.
S406, when the relay feedback relay is closed, the first DC/DC is in a working state, the second DC/DC is in a working state, the whole vehicle control unit sends a working request to the solar battery control unit, and when the feedback working state of the solar battery control unit is received and the working state is the working state, the vehicle enters a parking charging mode.
Specifically, when the relay feedback relay is closed, the first DC/DC is in a working state, and the second DC/DC is in a working state, the entire vehicle control unit sends a working request to the solar battery control unit, that is, requests the solar battery to charge the power battery, and when the feedback working state of the solar battery control unit is received, it indicates that the solar battery starts to work to charge the power battery, and at this time, the parking charging mode is entered.
Alternatively, fig. 5 is a flowchart of a control method of another hybrid system according to an embodiment of the present invention. Referring to fig. 5, the control method of the hybrid system according to the embodiment includes:
s501, in a running preparation completion mode, if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
And S502, when the state of charge of the power battery is smaller than a second preset value, controlling the start of the fuel battery.
S503, when the charging condition includes that the state of charge of the power battery is smaller than a third preset value; wherein the third preset value is greater than the second preset value.
S504, in the parking charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit is awakened, and the whole vehicle control unit sends charging available information to the terminal.
And S505, if a charging request sent by the terminal is received, when a charging condition is met, the whole vehicle control unit controls the relay to be electrified, and controls the fuel cell control unit to enable the first DC/DC.
S506, when the relay feedback relay is closed, the first DC/DC is in a working state, the second DC/DC is in a working state, the whole vehicle control unit sends a working request to the solar battery control unit, and when the feedback working state of the solar battery control unit is received and the working state is the working state, the vehicle control unit enters a parking charging mode.
S507, if at least one of the following conditions is met in the starting charging process or the parking charging process, a parking charging power-off process is carried out, and meanwhile, the whole vehicle control unit reports the charging stop to the terminal:
a fault high-voltage power-off request, an engine room cover opening, a vehicle door opening and a low-voltage power supply state not in a closing state are carried out; the first DC/DC feedback working state is in a non-working state, the second DC/DC feedback working state is in a non-working state, and the working state of the solar cell control unit is in a non-working state for more than preset time; the state of charge of the power battery is larger than a first preset value.
In particular, electrical faults under high voltage may include insulation failures or high voltage interlock faults, etc., e.g., some components are not connected into the high voltage circuit, i.e., the electrical connection of the system circuit is incomplete. The low-voltage power state off state may include the vehicle being in a ready-to-start state or an ignition state, etc. The first DC/DC feedback operating state non-operating state may be that the first DC/DC fails, and the second DC/DC feedback operating state non-operating state may be that the second DC/DC fails. The working state of the solar cell control unit is a non-working state and exceeds the preset time, wherein the preset time can be obtained through tests and is used for determining that the voltage of the solar cell has no capability to continue charging the power cell, and frequent switching of the states of the solar cell control unit is avoided. The state of charge of the power battery is larger than the first preset value, namely the state of charge of the power battery is larger than the charging upper limit, and continuous charging is not needed. And at the moment, a parking, charging and power-off process is carried out, and meanwhile, the whole vehicle control unit reports the charging stop to the terminal and reports the reason for stopping charging.
Alternatively, fig. 6 is a flowchart of a control method of another hybrid system according to an embodiment of the present invention. Referring to fig. 6, the hybrid system control method provided by the present embodiment includes:
s601, in a running preparation completion mode, if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the whole vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery.
And S602, when the state of charge of the power battery is smaller than a second preset value, controlling the start of the fuel battery.
S603, when the charging condition comprises that the state of charge of the power battery is smaller than a third preset value; and the third preset value is larger than the second preset value.
And S604, in the parking and charging mode, when the solar battery control unit detects that the solar battery can be used, the whole vehicle control unit is awakened, and the whole vehicle control unit sends available charging information to the terminal.
And S605, if the charging request sent by the terminal is received, when the charging condition is met, the whole vehicle control unit controls the relay to be electrified and controls the fuel cell control unit to enable the first DC/DC.
And S606, when the relay feedback relay is closed, the first DC/DC is in a working state, the second DC/DC is in a working state, the whole vehicle control unit sends a working request to the solar battery control unit, and when the feedback working state of the solar battery control unit is received and the working state is the working state, the vehicle control unit enters a parking charging mode.
S607, when at least one of the following conditions is met in the starting charging process or the stopping charging process, the whole vehicle control unit sends a work stopping request to the solar battery control unit, the whole vehicle control unit stops the first DC/DC enabling, stops the second DC/DC enabling, controls the relay to be powered off, the vehicle network enters a sleep state, and simultaneously the whole vehicle control unit reports the charging stopping to the terminal:
a fault high-voltage power-off request, an engine room cover is opened, a vehicle door is opened, and a low-voltage power supply state is not in a closed state; the DC/DC feedback working state is a non-working state, the second DC/DC feedback working state is a non-working state, and the working state of the solar cell control unit is a non-working state for more than preset time; the state of charge of the power battery is larger than a first preset value.
Specifically, when the at least one condition is met in the starting charging process or the stopping charging process, the whole vehicle control unit sends a work stopping request to the solar battery control unit, the whole vehicle control unit controls the first DC/DC to stop working, controls the second DC/DC to stop working, controls the relay to be powered off, and controls the vehicle network to enter a sleep state, and meanwhile, the whole vehicle control unit reports the charging stop to the terminal and reports the reason for stopping charging.
Fig. 7 is a schematic structural diagram of a hybrid power system according to an embodiment of the present invention, and the system is suitable for a hybrid power system control method according to any embodiment of the present invention. Referring to fig. 7, the system includes:
the system comprises a vehicle control unit 1, a fuel cell 2, a power cell 3, a relay 4, a solar cell 5, a solar cell control unit 6 and a gateway 7; the power battery 3 is connected with a first end of the relay 4, and the fuel battery 2 is connected with a second end of the relay 4; the second end of the relay 4 is connected with a driving motor 8; the solar cell control unit 6 and the vehicle control unit 1 are in communication connection with the gateway 7;
in the running preparation completion mode, the vehicle control unit 1 is used for determining a power demand according to a driving operation, requesting to start the fuel cell 2 when the power demand exceeds the power capability of the power cell 3, and working in the pure electric mode if the power demand does not exceed the power capability of the power cell 3;
the vehicle control unit 1 is used for sending a request to the solar cell control unit 6 when the state of charge of the power battery 3 is smaller than a first preset value and the state reported by the solar cell control unit 6 is available, so as to control the solar cell 5 to output electric energy to the driving motor 8 or charge the power battery 3;
in the parking charging mode, the solar cell control unit 6 is used for waking up the entire vehicle control unit 1 when detecting that the solar cell 5 is available, and the entire vehicle control unit 1 sends available charging information to the terminal 10, if receiving a charging request sent by the terminal 10; when the charging condition is met, the whole vehicle control unit 1 is used for controlling the relay 4 to be electrified, and meanwhile, the solar battery 5 is controlled to charge the power battery 3 through the solar battery control unit 6.
Specifically, the vehicle control unit 1 may be configured to determine a power demand according to a driving operation, and control the fuel cell 2 and the solar cell control unit 6 to start or stop charging the power battery 3 or outputting electric power to the drive motor 8. The fuel cell 2 is used to charge the power cell 3 when the power demand exceeds the power capacity of the power cell 3. The power battery 3 is used to power the vehicle. The relay 4 is used to be in a high voltage power-on or high voltage power-off state by closing and opening the switching system. The solar cell 5 is used for converting solar energy into electric energy to charge the power cell 3, and the solar cell control unit 6 is used for reporting whether the state of the solar cell 5 is available, the voltage of the solar cell 5 and the like, and controlling the solar cell 5 to charge the power cell 3. The gateway 7 may be the core of a communication lan inside the vehicle, and is used to implement the functions of sharing information on each bus, network management inside the vehicle, fault diagnosis, and the like. The driving motor 8 is used for converting electric energy into mechanical energy, and driving wheels and working devices through a transmission device or directly. The terminal 10 may be a mobile phone APP for communicating information with the vehicle control unit via the vehicle telematics terminal 11.
Specifically, the entire vehicle control unit 1 determines a power demand according to a driving operation, requests to start the fuel cell 2 when the power demand exceeds the power capability of the power cell 3, supplies power to the vehicle through the power cell 3, the solar cell 5 and the fuel cell 2 together, and operates in a pure electric mode to supply power to the vehicle through the power cell 3 and the solar cell 5 together or supplies power to the vehicle through the power cell 3 alone if the power demand does not exceed the power capability of the power cell 3. When the state of charge of the power battery 3 is smaller than the upper charging limit of the power battery 3 and the voltage of the solar battery 5 reaches the voltage value capable of being output externally, the vehicle control unit 1 sends a request to the solar battery control unit 6 to control the solar battery 2 to output electric energy to the driving motor 8 or charge the power battery 3. In the parking charging mode, when the solar battery control unit 6 detects that the voltage of the solar battery 5 has the capability of outputting externally, the whole vehicle control unit 1 is awakened, the whole vehicle control unit 1 sends available charging information to the terminal 10, if a charging request sent by the terminal 10 is received, the whole vehicle control unit 1 controls the relay 4 to be powered on in a combined mode when the charging condition is met, and meanwhile, the solar battery 5 is controlled to charge the power battery 3 through the solar battery control unit 6.
According to the technical scheme of the embodiment of the invention, the solar battery and the fuel battery work cooperatively to provide power for the vehicle, if the power requirement of the vehicle exceeds the power capability of the power battery, the fuel battery is started to supply power for the vehicle together with the solar battery and the power battery, and if the power requirement of the vehicle does not exceed the power capability of the power battery, the vehicle works in a pure electric mode, namely the vehicle is supplied with power only through the solar battery and the power battery; and when the vehicle is in a parking charging state, the solar cell control unit can control the solar cell to charge the power battery according to the power of the solar cell and the charge state of the power battery, so that the solar energy and the battery electric energy are fully utilized, and the power supply efficiency is improved.
Alternatively, fig. 8 is a schematic structural diagram of another hybrid system provided in the embodiment of the invention. Referring to fig. 8, the hybrid system further includes:
the fuel cell 2 includes a fuel cell stack 21, a first DC/DC22, and a fuel cell control unit 23; a first terminal of the first DC/DC22 is connected to the solar cell 5 and the fuel cell stack 21; the second end of the first DC/DC22 is connected with the second end of the relay 4; the fuel cell control unit 23 is in communication with the entire vehicle control unit 1.
Specifically, the fuel cell stack 21 is used for providing electric energy to charge the power battery, the first DC/DC22 may be a boost DC/DC for controlling the solar cell 5 and/or the fuel cell 2 to deliver energy to the power battery 3, and the fuel cell control unit 23 is used for controlling the operating states of the fuel cell stack 21 and the first DC/DC 22. The solar cell 5 is cooperatively controlled by the solar cell control unit 6 and the first DC/DC22 whether to supply energy to the power cell 3.
Alternatively, fig. 9 is a schematic structural diagram of another hybrid power system provided by the embodiment of the invention. Referring to fig. 9, the hybrid system further includes:
the fuel cell 2 includes a fuel cell stack 21, a first DC/DC22, and a fuel cell control unit 23; a first end of the first DC/DC22 is connected to the fuel cell stack 21; the second end of the first DC/DC22 is connected with the second end of the relay 4; the solar cell 5 is connected with the first end of the relay 4; the fuel cell control unit 23 is in communication with the entire vehicle control unit 1.
Specifically, the embodiment of the invention is another connection mode of the hybrid power system, and the first DC/DC22 is only used for controlling the fuel cell 2 to deliver energy to the power cell 3. The solar cell 5 controls whether or not to supply energy to the power cell 3 only by the solar cell control unit 6.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A hybrid powertrain system control method, comprising: the system comprises a vehicle control unit, a fuel cell, a power cell, a relay, a solar cell control unit and a gateway; the power battery is connected with the first end of the relay, and the fuel battery is connected with the second end of the relay; the second end of the relay is connected with a driving motor;
the control method comprises the following steps:
in a running preparation completion mode, the whole vehicle control unit determines a power demand according to driving operation, requests to start the fuel cell when the power demand exceeds the power capacity of the power cell, and works in an electric only mode if the power demand does not exceed the power capacity of the power cell;
if the state of charge of the power battery is smaller than a first preset value and the reported state of the solar battery control unit is available, the vehicle control unit sends a request to the solar battery control unit to control the solar battery to output electric energy to the driving motor or charge the power battery;
under the parking charge mode, awaken up when solar cell control unit detects that solar cell can use whole car control unit, whole car control unit sends the available information that charges to the terminal, if receive the charge request that the terminal sent, when satisfying the charging condition, whole car control unit control the relay is gone up the electricity, passes through simultaneously solar cell control unit control solar cell charges for power battery.
2. The method of claim 1, wherein the vehicle control unit determines a power demand from a driving maneuver, and requests activation of the fuel cell when the power demand exceeds a power capability of the power cell, comprising:
when the state of charge of the power battery is smaller than a second preset value, controlling the start of the fuel battery;
the charging condition comprises that the state of charge of the power battery is smaller than a third preset value; wherein the third preset value is greater than the second preset value.
3. The method of claim 2, further comprising: when the state of charge of the power battery is greater than or equal to the third preset value, the finished automobile control unit controls the fuel battery to stop;
and when the state of charge of the power battery is greater than the first preset value, the solar battery control unit controls the solar battery to stop working.
4. The method of claim 1, wherein the requirements to enter the parking charging mode comprise: no person is on the vehicle, the vehicle is in a locked state, and the vehicle network is in a sleep mode.
5. The method of claim 2, wherein the charging condition comprises at least one of: the method comprises the steps that no high-voltage electrification forbidding fault exists, an engine room cover is in a closed state, a vehicle door is in a closed state, a low-voltage power supply state is in an off state, and the charge state of the power battery is smaller than a first preset value.
6. The method of claim 2, wherein the fuel cell comprises a fuel cell stack, a first DC/DC, and a fuel cell control unit; the second end of the relay is connected with a second DC/DC;
the whole car the control unit control the relay is gone up the electricity, passes through simultaneously solar cell the control unit control solar cell charges for power battery, includes:
the whole vehicle control unit controls the relay to be electrified and controls the fuel cell control unit to enable the first DC/DC;
when the relay feedback relay is closed, the first DC/DC is in a working state, the second DC/DC is in a working state, the whole vehicle control unit sends a working request to the solar battery control unit, and when the feedback working state of the solar battery control unit is received as the working state, the vehicle control unit enters a parking charging mode.
7. The method of claim 6, wherein if at least one of the following conditions is met during the starting charging process or the stopping charging process, the stopping charging power-off process is performed, and the vehicle control unit reports the charging stop to the terminal:
a fault high-voltage power-off request, an engine room cover is opened, a vehicle door is opened, and a low-voltage power supply state is not in a closed state; the first DC/DC feedback working state is a non-working state, the second DC/DC feedback working state is a non-working state, and the working state of the solar cell control unit is a non-working state which exceeds a preset time;
and the state of charge of the power battery is greater than the first preset value.
8. The method of claim 7, wherein the parking charge down current pass comprises:
the whole vehicle control unit sends a work stopping request to the solar cell control unit, stops the first DC/DC enabling, stops the second DC/DC enabling, controls the relay to be powered off, and enables the vehicle network to enter a sleep state.
9. A hybrid powertrain system, comprising: the system comprises a vehicle control unit, a fuel cell, a power cell, a relay, a solar cell control unit and a gateway; the power battery is connected with the first end of the relay, and the fuel battery is connected with the second end of the relay; the second end of the relay is connected with a driving motor; the solar cell control unit and the whole vehicle control unit are in communication connection with the gateway;
in a running preparation completion mode, the vehicle control unit is used for determining a power demand according to a driving operation, requesting to start the fuel cell when the power demand exceeds the power capacity of the power cell, and working in an electric-only mode if the power demand does not exceed the power capacity of the power cell;
the whole vehicle control unit is used for sending a request to the solar cell control unit when the state of charge of the power battery is smaller than a first preset value and the reported state of the solar cell control unit is available so as to control the solar cell to output electric energy to the driving motor or charge the power battery;
in a parking charging mode, the solar cell control unit is used for awakening the whole vehicle control unit when detecting that the solar cell can be used, the whole vehicle control unit sends available charging information to the terminal, and if a charging request sent by the terminal is received; when the charging condition is met, the whole vehicle control unit is used for controlling the relay to be electrified, and meanwhile, the solar battery is controlled by the solar battery control unit to charge the power battery.
10. The hybrid system of claim 9, wherein the fuel cell includes a fuel cell stack, a first DC/DC, and a fuel cell control unit; a first terminal of the first DC/DC is connected to the solar cell and the fuel cell stack; a second end of the first DC/DC is connected with a second end of the relay;
and the fuel cell control unit is in communication connection with the whole vehicle control unit.
11. The hybrid system of claim 9, wherein the fuel cell includes a fuel cell stack, a first DC/DC, and a fuel cell control unit; a first end of the first DC/DC is connected to the fuel cell stack; a second terminal of the first DC/DC is connected with a second terminal of the relay; the solar battery is connected with the first end of the relay;
and the fuel cell control unit is in communication connection with the whole vehicle control unit.
CN202210772010.1A 2022-06-30 2022-06-30 Hybrid power system control method and system Pending CN115257412A (en)

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CN202210772010.1A CN115257412A (en) 2022-06-30 2022-06-30 Hybrid power system control method and system

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